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LDPC码在基于BP (Belief Propagation) 的迭代译码相结合的条件下具有逼近Shannon 限的性能，是继turbo 码后在纠错编码领域又一重大进展。压缩文件中给出了LDPC在高斯信道下的c程序。-LDPC codes based on BP (Belief Propagation) Iterative Decoding of combining conditions with performance approaching Shannon limit on the heel
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Turbo码，LDPC码（低密度奇偶校验码）均具有接近Shannon限的性能，
是目前便译码研究的热点。Turbo码在低信噪比情况下的性能优于其它各种编码
方式。而LDPC码的描述简单，具有较大的灵活性，当码长足够长时具有比Turbo
码更为良好的性能，其译码复杂度低于Turbo码。-Turbo code, LDPC code (LDPC) all have close to Shannon limit performance, it is the firm' s resear
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Why LDPC Codes are Strong
Candidates for Next Generation
Wireless Systems
♦ Next Generation Wireless Systems typically require higher
data throughput in a given bandwidth
• High rate FEC with higher order modulation (e.g. cdma2000
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In this paper, we employ iteratively decodable codes in a turbolike receiver of a multiple-input multiple-output (MIMO) orthogonal frequency division multiplexing (OFDM) communication system. With such a receiver, we compare the decoding complexity a
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In this paper, we are concerned with developing a common
implementation architecture for both turbo codes and LDPC
codes. We view the constituent convolutional code in a turbo
code as a block code, and construct a sparse parity check
matrix for i
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